I am writing a story centered around a planet orbiting a Blue Supergiant star. What I want to know is how far away a planet would have to be to be in the habitable zone of such a star. The star I have in mind is roughly comparable to Rigel and don't mind anything like the need for protection from radiation, the race that inhabits this world can handle radiation and the likes of solar flares to the point they basically thrive in radiation that would utterly destroy a human.
Some side questions I have are these:
How many Earth years would 1 year on this planet be?
Would the 4 seasons still be roughly equally divided in that year?